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Darwin, Charles, 1809-1882

"The Different Forms of Flowers on Plants of the Same Species"


PLANTS 3 AND 4.
These two long-styled plants, after being freely and legitimately fertilised
during 1863 by the same illegitimate mid-styled plant as in the last case, were
as miserably sterile as Number 2.
PLANT 5.
This long-styled plant, after flowering in 1863 close to an illegitimate mid-
styled plant, yielded only four capsules, which altogether included only five
seeds. During 1864, 1865, and 1866, it was surrounded either by illegitimate or
legitimate plants of the other two forms; but it did not yield a single capsule.
It was a superfluous experiment, but I likewise artificially fertilised in a
legitimate manner twelve flowers; but not one of these produced a capsule; so
that this plant was almost absolutely barren.
PLANT 6.
This long-styled plant, after flowering during the favourable year of 1866,
surrounded by illegitimate plants of the other two forms, did not produce a
single capsule.
PLANT 7.
This long-styled plant was the most fertile of the eight plants of the first
lot. During 1865 it was surrounded by illegitimate plants of various parentage,
many of which were highly fertile, and must thus have been legitimately
fertilised. It produced a good many capsules, ten of which yielded an average of
36.1 seeds, with a maximum of 47 and a minimum of 22; so that this plant
produced 39 per cent of the full number of seeds.


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